Question Factor the expression (x−1)(x+1) Evaluate x2−1Rewrite the expression in exponential form x2−12Solution (x−1)(x+1) Show Solution Find the roots x1=−1,x2=1 Evaluate x2−1To find the roots of the expression,set the expression equal to 0 x2−1=0Move the constant to the right-hand side and change its sign x2=0+1Removing 0 doesn't change the value,so remove it from the expression x2=1Take the root of both sides of the equation and remember to use both positive and negative roots x=±1Simplify the expression x=±1Separate the equation into 2 possible cases x=1x=−1Solution x1=−1,x2=1 Show Solution
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